RX480 Asus Strix Black Screen, Performance Problems

Okay. So here is my problem, i got a crossfire of two RX480 ASUS STRIX and when ever i try to update the driver while CrossFired my screen goes black and forth for few times and in the fifth to sixth time my computer freeze for about 15 minutes, and when i try to move my mouse it's not responding for a while and then its blink to a different spot on the screen.

i found the problem was with the crossfire after trying to use them Separately. they worked fine on their own but on crossfire the screen goes black while installing a driver or while playing games the performance is dramatically going down.

Are you using the Asus GPU Tweakit app in any way? Try disabling that completely (uninstall it to test). I was experiencing the exact same issues when I still had my Strix cards - until I completely wiped any trace of their TweakIt app. My cards performed better when I wanted to OC with Wattman anyways. Just something to try out.

I previously had this issue, and I actually sent my card(s) back to the manufacturer, who updated the bios on them. (I actually didn't know that could be done, but there you go). When they returned I was able to toggle CrossfireX mode on/off without my PC dying. You could use GPUz to check and see what bios you have on your cards, and then see if there is an update available before actually sending them anyway. I have different cards to you so it could be unrelated, but your symptoms are identical to mine.

I generally don't recommend flashing those unless the manufacturer provides it (it can in most cases void any warranty), or if the cards are already passed waranty. I'm curious though, which BIOS did you use (or from which site)?

Ah. That is good to know. I have obviously been going down the wrong path. That must have been a windows update then. Many thanks for pointing this out. Now to find out what Windows Has Changed/Not Installed.

** Windows 7 and Windows 8.1 must be fully updated before attempting to install any AMD driver. All 'critical', 'recommended', and 'optional' (no language packs,etc) updates as well as any Service Packs (SP) must be installed before any attempt to install graphics drivers. If you do not get this message .... keep installing until you do: